Install guide

18 Software Reference
Configuring IGMP
IGMP is disabled by default on the switch, and on all interfaces. To enable or
disable IGMP on the switch, use the commands:
enable ip igmp
disable ip igmp
IGMP snooping is enabled by default and is independent of IGMP.
IGMP must be enabled on an interface before it can send or receive IGMP
messages on the interface. To enable or disable IGMP on an interface, use the
commands:
enable ip igmp interface=interface
disable ip igmp interface=interface
IGMP keeps the local group database up to date with current multicast group
members by updating it when it hears IGMP Host Membership Reports on an
interface. If the switch is the IGMP designated router for the subnetwork, it
sends out IGMP Host Membership Queries at a Query Interval. If it does not
receive a Host Membership Report for a multicast group on an interface within
the Timeout period, it deletes the multicast group from its local group
database. The default of the Query Interval (125 seconds) and of the Timeout
((2*Query Interval) + 10 seconds) suit most networks. These defaults should be
changed with caution, and with a sound understanding of how they affect
interaction with other devices. To change the intervals, use the command:
set ip igmp [lmqi=1..255] [lmqc=1..5]
[queryinterval=1..65535] [queryresponseinterval=1..255]
[robustness=1..5] [timeout=1..65535]
IGMP can be configured to monitor the reception of IGMP general query
messages on an interface, and generate a log message and an SNMP trap if a
general query message is not received within a specified time interval. To
configure monitoring on an interface, use the command:
set ip igmp interface=interface querytimeout={none|0|
1..65535}
To display information about IGMP and multicast group membership, use the
command:
show ip igmp [interface=interface] [destination=ipadd]
If IGMP snooping is enabled, this command also displays the ports listening to
the multicast group for each VLAN-based IP interface.
To display IGMP counters, use the command:
show ip igmp counter [interface=interface]
[destination=ipadd]